3-1/2 teaspoons white grape juice
2-1/2 teaspoons apple cider vinegar
2 tablespoons fresh lemon juice
2 tablespoons minced shallot
1/4 cup walnut oil
1/4 cup olive oil
8 large butter lettuce leaves
3 ripe avocados, halved, pitted, peeled, thinly sliced
3 large Ruby Red grapefruits, all peel and white pith cut away, segments cut from between membranes
Whisk grape juice, vinegar, lemon juice and shallots in small bowl to blend. Gradually whisk in both oils. Season dressing to taste with salt and pepper.
Arrange lettuce on platter. Top with avocado and grapefruit, then dressing.